Best Way to Run 3 x 27" Cinema Displays w/ 1 Card in OSX+Windows

hey guys,

title says, want run 3 x 27" cinema displays mac pro 6 core 2010 model. i've got 5870 ordered when bought machine when refreshed in 2010. i'm plugging in 2 monitors directly card using mini-displayport. since 3rd port on card dual link dvi, i've got atlona dp400 dl dvi > mdp adapter. works in os x , full resolution of monitor using it. however, in windows, monitor goes maximum resolution of 720p (1280x720). know common problem using 5xxx cards , adapter in windows, looking solution give me @ least 1080p in windows (1920x1080).

came across card (http://www.gefen.com/kvm/dproduct.jsp?prod_id=9898) claims have "an edid switch button provided manually selecting 3 edid modes: 2560x1600, 2560x1440, or pass-through.". can't seem find thats tried mac pro , windows, i'm not sure if it'll have same problem atlona card.

there other ways 3 monitors running in both os x , windows (at least 1080p in windows, , full res in os x)? has tried atlona adapter amd 6870, since problem might 5xxx cards only?

i'd appreciate provide. thanks!

 

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